I get the Error
Unable to start activity ComponentInfo{de.androidbuch.activiti/de.androidbuch.activiti.task.Activity}: android.view.InflateException: Binar
Make sure there is no exception raised in the onCreateView method of the fragment. If any exception is raised in this method, logcat won't show exact details of the exception, instead it always shows the message:
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.fragment"
on path: DexPathList[[zip file "/data/app/com.package/base.apk"],
nativeLibraryDirectories=[/data/app/com.package/lib/arm64, /vendor/lib64, /system/lib64]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)